20 Walnut St
Islip, NY 11751
— ba 1,232 sqft Built 1928 Lot 6,098 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $22,000 | $5,500 | $27,500 | $9,726 |
| 2024 | $22,000 | $5,500 | $27,500 | $9,220 |
| 2023 | $22,000 | $5,500 | $27,500 | $9,220 |
| 2022 | $22,000 | $5,500 | $27,500 | $9,247 |
| 2021 | $22,000 | $5,500 | $27,500 | $8,961 |
| 2020 | $22,000 | $5,500 | $27,500 | $8,734 |
| 2018 | $22,000 | $5,500 | $27,500 | $8,511 |
| 2017 | $22,000 | $5,500 | $27,500 | $7,258 |
| 2016 | $22,000 | $5,500 | $27,500 | $7,238 |
| 2015 | $22,000 | $5,500 | $27,500 | $7,250 |
| 2014 | $22,000 | $5,500 | $27,500 | $7,156 |
| 2013 | $22,000 | $5,500 | $27,500 | $7,000 |
| 2012 | $22,000 | $5,500 | $27,500 | $6,754 |
| 2011 | $22,000 | $5,500 | $27,500 | $6,475 |
| 2010 | $22,000 | $5,500 | $27,500 | $6,201 |
| 2008 | $22,000 | $5,500 | $27,500 | $5,935 |
| 2007 | $21,500 | $5,500 | $27,000 | $5,315 |
Property facts
Year built
1928
Property type
single_family
Stories
—
Beds
—
Baths
—
Living area
1,232 sqft
Lot size
6,098 sqft
ZIP code
11751
City
Islip
Street
Walnut St
Coordinates
40.74539, -73.20641
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 20 Walnut St last sell?
No public-record sale is on file for 20 Walnut St.
What is the current tax assessment for 20 Walnut St?
The most recent total assessment for 20 Walnut St (year 2025) is $27,500 with $9,726 in property tax.
When was 20 Walnut St built?
20 Walnut St was built in 1928.
How does 20 Walnut St compare to others on Walnut St?
We track 7 other properties on Walnut St. Browse the list under "Other properties on Walnut St" to compare beds, baths, and sale history.
What are the property facts for 20 Walnut St?
20 Walnut St is a — bath, 1,232 sqft, 6,098 sqft lot single_family.
Is 20 Walnut St a flip candidate?
No — 20 Walnut St does not appear in our flips dataset.
Is 20 Walnut St a tax-appeal candidate?
No — 20 Walnut St is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+1.3%
Implied 1-yr
+5.1%
2026 Q1
$500.4K
2026 Q2
$506.3K
ZIP 11751 — Median Price History + Forecast
Explore nearby
Other properties on Walnut St